Speed-changing mechanism for power-driven machines.



A. SCHDENKY.

SPEU. CHANG-mc MECHAmSM FOR POWER OWEN MACHiNEs.

APPLICMION FHL() EAN, 19H.

1,167,365. Iuend Jun. i, 12H15,

A. R. SCHUNKY.

SPEED CHANGING MECHANISM FR POWER DRH/EN MACHINES.

APPLICATION mln JAN. 1, m4.

1,167,365. Patented Jun. 4, Nif).

5 SHEETSMSHEU 2.

A. H SUHUENKY.

SPEED cHANGiNG MECHANISM Foh www www ,vlACHlNESL APPLICATlON FILED EAN. 7, i914.

Patented- Jim. 4, 12H6.

5 SHEETS-SHEU 3.

,Da/ewa,"

QR ogw;

A. R. SCHUENKY( SPEED CHANGING MEGHAMSM FOR POWER www MACHINES APPLECATION ULL() IAN..19I4.

Patented Jun. Yl, IJlt.

5 SHEES -SHLH 4.

UNITED sTATEs PATENT OFFICE.

AUGUST R: SCHOENKY, OF S0`MERVILLE, MASSACHUSETTS SPEED-CHANGING MECHANISM FOR POWER-DRIVEN MACHINES.

Specification of Letters Patent.

Patented J an, 4, 1916.

Application filed January 7, 1914. Serial No. 810,696.

Ifo nl! fr//ont it may concern:

Be it known that I, AUGUSTE. ScIIoENKY,

driver or power shaft and the driven member, such as a running shait, may be readjusted under proper control tor starting or stopping. increasing, decreasing or reversing the motion of the driven' shaft.

The invention is adaptable to many classes ot' power driven machines including both self-propelling: machines, such as motor vehicles, and stationary machines, such as nail -h'iving or other machines used in factories. The former class represents machines driven in practice at variable speeds and the latter machines havingl but a single nm'mal speed.

The main object of the present invention that the 'fruition of the power shaft, which may bc supposed to be running continuously and steadily, may be effectively transmitted to the driven shaft in various ratios. these changes or readjustments of transmission being consummated by power under appropriate control.

Other and more specific objects will appear in the hereinafter following descrip- Stien.

.To the attainment of such recited objects Y this invention comprises the combination with the driver or power shaft, and the driven shaft, of a certain kind of adjustable transmitter between them, and connections whereby the transmitter is adjusted directly or indirectly trom some portion of the train ot driving or driven elements. The transmitter, distinguished from a mere clutch which connects and disconnects, is ot a type having', not only full speed and Zero positions, but also intermediate positions,'and which preferably enables rather than a mere step by step change, a gradual and progressive change rthrough all consecutive intermediate speed ratios. For convenience this will be designated a. variable speed transf mitter and herein is illustrated of the t'ype known as face friction gearing. The connections by which the lvariable speed transmnter is readjusted from an'element of the train of mechanism may be rendered operative or inoperative according to whether the state of speed of the driven shaft is to be changed ,or maintained, and

according to this invention the shitting of such connections between operative and in! operative condition is adapted to be effected atthe will of the operator or in other suitably controlled manner.

. As will be hereinafter seen there are illustrated three species of this improvement. Generally speaking, the driver and the elements immediately in train with i-t may be .considered constantly ruiming parts, whereas thev driven shaft and parts in train with it are not constantly but intermittently runningr and, in some cases, variably. In the tirst species the adjustment of the variable speed transmitter is effected from the driving shaft' or a constantly running part immediately in train with it and by these means the driven parts may have their m0- tion started, increased, decreased or reversed. In the Ysecond species the variable speed transmitter is adjusted from the driven member or immediately connected part, for example, in order to decrease the speed of the driven member or to effect a stoppage thereof in a peculiarly easy and advantageous mode. In the third species the adjustment is etiected not directly from one of the train of elements. but indirectly through the action. of a spring or equivalent which may be put under strain by one of theI train of driving or driven parts.

Herein are shown three specific illustrations or modications embodying the present improvement and the several species thereof above mentioned` The first illustration is of a self-propelling class of= machine, a moin which are combined the first and second species. The 'second illustration is of the stationary class of machine, a nail driving machine, in which the second and third species are combined for stopping and starting respectively. .The third illustration is also of a ynailing machine but illustrating the first and second species.

Each illustration embodies cies of the'invention; namely, that in which the driven member effects adj `stment of the variable speed transmitter. In each casi this adjustment is toward zero speed'and if uninterrupted effects the stoppage of the machine. Moreover this stoppage is effected not only quickly and efficiently but in a certain yet easy manner which precludes unnecessary shock. The peculiar result is at tained that the driven shaft effects its own stoppage because itl readjusts to zero the variable speed transmitter from which it derives itsmotion. The adjustment, therefore, of the variable speed transmitter from the running speed to zero is not a steady adjustment but decreases as the machine slows down. slowing driven shaft and the slowingy adjustment of the transmitter has lhe result of an initially rapid rate of speed decrease of the machine, the rate becoming less and less toward the final stopping position and eventually bringing the machineto rest with practically no shock.` This advantageous action is partly due to the fact that as the transmitter is adjusted it effects a substantial' retarding of the driven shaft and in this way the momentum of the driven shaft and parts connected with it is used up in effecting the adjustment of 'the transmitter and in retarding the shaft. In this way is afforded a new employment of a variable speed transmitter, which is an instrument devised simplyfor securing varying running speeds. Herein it is used so that the driven shaft effects a self-adjustment from running speed, whatever it-may be` toward or to zero speed thus giving the noiseless, shockless action referred to.

Having stated the general nature of this improvement, the several illustrative embodiments thereof shown in the drawings will now be described in detail andthereafter the novel features will be set forth in the appended claims.

In the accompanying drawings Figure l is a plan view of a portion of a self-propelling machine or motor vehicle embodying the resent improvements; while Fig. 2 is a. le t side elevation thereof partly in section on the plane 22 of Fig, l; and Fig. 3 is a diagram showing how the automatic adjustment of the variable speed transmitter may be controlled from a single lever. Fig. 4 is a right elevation of a stationary mazhine, namely, a nail driving machine, embodying the present improvements; while Fig. 5 is la front elevation partly in section on the plane 5 5 of Fig. 4; and Figs. 6 and 7 are left elevations of details. Fig.8 is a right elevation of a modified embodiment of the present improvements in a machine of the class and type shown in Figs. 4 to 7; while Figs. 9 and 10 show left and right views of the stopping and starting cams respectively. I,

Firsty will be described an embodiment of lthis improvement in connection with a self The combined action of the f propellingr machine; namely, a motor vc hicle. ()n the machine frame 1S is supported engine lf) having' fly-wheel '20 and shaft '.21 which may be considered the driver or (l1-hing shaft of the present improvement. Supported on a pair of cross frame bars 22 is bearinj,r '23 for shaft ,21. A va riable speed transmitter of the face friction type havingr been adopted for illustration, the shaft 21 is shown as carrying a driving disk .24 which may have the usual aluminum-copper alloy face. The running parts of the present mechanism may conveniently Vbe divided into the driving train of parts including engine lf), fly-wheel 20, shaft 2l und friction disk '224, while the driven train of parts includes the friction wheel coiperating with the disk and the running parts between that and the vehicle axle. The driving train' may be lconsidered as continuously ruiming parts` .ignoring changes in engine operation, while the driven train may be considered as intermittently running and at varying speeds. For entirely' interrupting the drive when desired, a lever 25 may be employed as usual to axially withdraw the disk 2l against the resistance of spring pressure which tends to hold the friction disk inl driving engagement. and thus constituting a clutch. ln frictional contact with the prepared face of disk 2i is the periphery of friction wheel 2G. The peripheryy may consist of a strawboard fiber ring. The wheel 26 is on a cross shaft '27 and is capable of axial adjustment, for example, by a spline between wheel and shaft. A sprocket wheel ZS on the cross shaft* 2T operates through chain 2S) 'and sprocket wheel 30 to drive the differential case 3l on the rear axle 3:2 of the vehicle whereby the driving action is connnunicated to the axle to cause the travel of the vehicle. ()rdinarily friction wheel '26 would ne adjusted at will to various positions with respect to the-disk 2l so that the disk would drive thel wheel forwardly or reversclv at varying speeds, or if the wheel be adjusted to the center of the disk, at zero speed. liy this adjustment and b v theclutch lever :5 and bv the vehicle brakes a certain control was afforded.

According to the present improvement the adjustment of the variable speed transmitter; namely. the friction dish and wheel, is to be effected by a running part of the mechanism. for changing the speed ratio with.

proper provision for control. To enable the adjustment of the friction wheel with respect to the disk an adjustingr device 35 is shown in the nature of a helical cam or screw shaft the rotation of which, operating through a threaded support 3G, causes the axial adjustment of the wneel 2G carried by the support. In order to adjust the Wheel 26 to commence or increase forn of the' driven shaft 32, the folons troni the driving train j he eziu lo-re glz Un the dri ver ,wel eea; tti engaging a similar a hora muetantly running eines if l D.' il. Through it sine driving Shait n'iay opersereu 55, hut the (zonoted to he disconnected or t i eo that the adjustment and he maintained or nurv he inn ift. To rhin ond e clutch mein uit 14,1? eojeratee with to which le Secured in ronnerted hy chain 2T if@ upon the adjusting hell fix-aula. lever 45t in indieated i me ehieh it, t and a con Y l troni the inver t? .i fnnmving part. By these wnne ti-fit-- the operator may at tie einneh lil., t5 and thereby y Shaft to etfeet an adm :if the variaiile speed transmitter inrrenee or initiate forward :n ifa the drii'rn ift 32. A reverse ..rixt :may hr. i-izsularly etfeeted hy the ,ser eonneetons: Un the crees shaft :t gger 53 engaging; a second i th it upon :i second e: :shaft {newton} ie .i-ontinuously running f ereition rereree to that of shaft 42. of enroeket wheel 56, chain .'37 et ffiheefi motion may be Coinn 'menig screw 35, and *at Y i and the sprocket 5G is inilnr to Clutch 44, 4in sind :rated hy n eluteh lever 6th hav- ,frn Jl to a suitable controlling i tions, when the clutch :uijuet the friction wheel 2C in the forward speed et' the n it they he stationary, nanef ",ie. drive thereof.

nifeet that in employing of? the a justin eoni'ieetions above wt :it tL pi'ojier time und thin i5 wiueutf stitiz-ilaotory for forward or re- .i ilu' Stopping hfiweveri it i-:ar ne niueirahie to give attention to the eintrh 4i. 45; or the elutch "ei, punition and Conn nieutly, l" ting eonneetinns. non' a i tial value and A eonizeetions ahout to he tleeerihezi are ed from t ih'iren train of naz ,y con- *o the prerii'iuelj' described ronneci ions` en eoixiierwl. tend alwnyeu in the enihmiiiwnt to adjust the variwl transmitter toward zero or @ton in, and. it the adjufstnient is uninterf until-ally to the zero or Stop position errer: is so rotated as `with the friction wheel at the center olf the. disk. `iVhen this adjustment is attained. the driven train ot' parte and the adjusting eonnections roule to n standstill requiring no attention to the-.t end from the operator.

'hile the connections referred to )night he actuated directly from the friction wheel shaft or screw 35, tor convenience of illustration a special driven Shaft (35 is shown,

thie` being rotated i'roin the driven shaft or rear axle 32 h v means ot' a sprocket chain tu?. For connecting and disconnecting the connections a clutch member 6T tast on the shaft engagera a clutrh nieinher Uhr and f to the latter is secured a sprocket wheel 6i) connected hy chain 7() with asproeket wheel "Il on the .screw threaded shaft 35. A rlutrh lever 7;. serves to open und Close the clutch' 6T, uti and a connection 73 may extend from the clutfh lever to a :suitable con trol part.

'lhe operati n of the recited connections is that when the eluteh. (i7, (58, is closed, the shaft {Si} conununi fates ite` motion to the adjuntingr Screw shaft 3.5 to adjust the friction wheel 2G toward the center ot' the diek 2l.' Thus if the machine is being driven .forwardlyand the rluteh is closed the friction wheel is adjusted to decrease the speed ot' the driven parts until it rearhes the center of the disk when the driven parts and the Connections come to rest thus stopping the lunch ine. (ln the other hand` if the machine he runnin;r in reverse direction, the closing ot' clutch 67, 68, eti'ects a reverse adjustment of the frietion wheel, this again bringing it to the renter ot' the disk and stopping the machine. Consequently the etfect is that when the elutrh tii'eeftl is rlosed the driven inenxher (whether we euneider it :1S the shaft 2i" axle or shaft 35) eti'eete a readjnstnient in the manner desrrihed yof the vari- :ihle speed transmitter to zero.y tins bring intf about itS own etopoage. `here is no uu- Qlutrhing nor disengagement during this op,-

eration. hut only7 a resuljustiuent ot the) transmitter` and the unclutehing device 25 need not come into play` although, of course,- the machine operator may indepdndently mnplov that or suitable brakes :it `'ilj. 1t will he seen thnt a progreseively variablepeed transmitter i8 jireferreeh that" iS to say, one ivliirh adjusts through all consecutive positions or Speed ratios rather thun Step by step. Either a forward or reverse motion t the driven parts rexu'ljusts the trnnSinitter lo :fern or stop position` whereas the pre- '.,ionsly described connections including rluteh 59 :night shift the friction wheel 26 ,heyond stop poeition thus actually reversing theflirertion of movement of the driven parts. i

The described inaclline-stopping conne0- tions numbered 66 to 7L having the control leven therefor, afford a peculiarly advantag-cous and convenient combination. The reasons l'or thisv superiority include the following: 'l`he readjusting ot' the transmitter toward xero not merely rtduces the driving action. but also etlects a distinct retardation ot' the driven parts thus combining' with its other functions that ot' a brake. Moreover, the momentum'of the machines driven parts is employed in ell'ecting the adjustment of the transmitter toward xero and to that eX- tent the momentum is reduced. thus assistingthe stoppingr action. In fact. it will be seen that the momentum of the driven parts is thereby made use of to retard their own motion. It is believed that this is the first mechanism in which such use ot' variable speed transmitter has been made. lt is t'ound that the mode ot' slowing:- and stopping' attained by this mechanism is radically ditl'erent from that attained in any other manner: for example. by the previouslydescribed connections including' clutch 59. By the connections (-'i to Tl the machine quickly loses its high speed. rapidly slowing down at first bnt as the lslowing;` progresses the rate otl speed redaction decreases so that toward the end the retarding torce is comparatively Ysmaller aml tht` machine finally is brought easilj and gently to a lstop. During` the entire operation there has been no abrupt ac tion but only a quick. ellicient and easy chantre trom runningr speedf to zero speed or inaction. The operation will be substantially the same wli'ether the machine has a regula and predetermined normal speed or whether its ncrmal running is at ditierent speeds as in Ythe cases respectively of stationary or self-propelling machines. with the described stopping' connections. it will be understood. is to be combined ysome appropi'iate startingr connections. such as those already described. or a starting connection such as will lie latei described in reference to another embodiment ot the invention.

It a diagram he constructed with time increments measured along the base line and the normal indicating speed a curve of speed decrease may be theoreti ally constructed. it startingv at the point of termination ot' the normal speed and convexingr downwardly similarly to a cur\rk of geometrical progr sion and extending.r tangentially to the base line at the end of the slowi112;` operation. 4Moreover, the entire action is entirely automatic upon closing` the clutch (3T-68. The broad principle involved in this part of the present invention might in some cases be adapted for adjusting the variable speed transmitter from the zero adjustment to increase speed. and in any case obviously the clutch might be thrown out at will to interrupt the automatic speed adjustment.

In the embodiment hereinafteil to be dcscribed the special stop connections are illustrated in a particular combination with the driven shaft/and certain mchani -.o comprising reciprocating parts rforming functions in the turning out o manufac tured articles, this mechanism having a cycle ot' operations definitely related to the driven shafts rotation. and the combination beingr such that the mechanism comprising reciprocating parts may always be brought to rest with the reciprocating parts in some desirable predetermined position; but that special combination is only included herein as an illustration. it constituting a distinct and divisible subject with snee-iai functions and advantages of its own, not herein made the subjectof claim.

All of the clutch shifting levers 49. 60. T'Z and their control connections 50. (il. T3 may, for convenience, be operated by a single handle or control lever T6 through any convenient mechanism. Associated with the centrol lever is shown a nctched plate TT attbi-ding tive lever positions. rl`he indicated central position of the lever serves to adjust the stopping.r connections while the extreme positions of the lever correspond with the forward and reverse drive respectively. Between the central and extreme positions are indicated neutral notches to which the handle may be adjusted when it is not desired to chantre the state oimotion of the driven parts. rI`he lever T6 may be pivoted and provided with a recessed bleek or member TH with which cooperate springr pressed members T9. $0 and Si connected respectively by the links 5t). (il and T3 with the three clutch levers. In the extreme forward position ot the lever To the member T9 will enter recessv in TS and in the rear extreme position the member S1 will enter recess. In the central position member S() enters recess. The movement ot' either member entering' recess serves to close thc respective clutch. thus in the adjustment. as in Fig. 3. the lever Tl has been shifted to close the clutch (ST. GS to bring the machine to a stop. By this arrangement the operator may throw the control lever to .one extreme position or the other according to whether he wishes the forward speed to increase or the reverse speed to decrease. or on the other hand the forward speed to decrease or the reverse speed to increase. Ihenever the speed is satisfactory the lever will be lett in one of the neutral notches whereupon the screw shaft 35 remains Stationary and the variable-speed-transmitter is maintained in the desired adjustment, At any time that it is desired to bring the machine to a stop the lever is thrown to the central notch.

Reference will now be made to an' illustration of the present improvement in eonnection with a stationary machine or one having a single normal running speed. For illustration there hasbeen selected a mallO 'the uppers (see Figs. 4 to 10).

` rod 101 which is urged upwardly chine which takes part in turning out the finished product of a factory: namely, a machine used 'in the manufacture of shoes on the McKay system for nailing the soles lto The nailing mechanisms operate by the main shaft of this machine need not be particularly described as they may be, generally speaking, similar to mechanisms illustrated in patents already issued or prior application now pending. As usual, the machine' frame 1S may have its main shaft 94 in its head or upper part extending forwardly and rearwardly and near the ffiirward end of thc shaft are located the work support, presser foot, reciprocating awl and nail driver, picker and feeding means, and associated parts for holding, puncturing, and dri-ving nails into, the bottom .r of the shoe X.

The novel features of the present improvement may be conveniently applied to this .class of machine in the following manner:

The driver may consist of the/pulley shaft having the usual fast and loose pulleys. At the forward end of shaft 85 is the forwardly pressed friction disk 8G engaging the frictionwheel 87 axially adjustable on shaft 88, having worm gear 89, 90 for communicating the motion to the upwardly cx tending rod 91 at the top of which is a worm gear 92, 93 whereby the rotation is conm' municated to the horizontal main shaft or driven member 94. Figs. 4 to 7 show the parts in driving adjustment. lVhen desircd the drive may be interrupted by the clutch device 97 between rod 91 and worm 92 and the clutch may be controlled by hand lever 98. For effecting the adjustment or shifting of the friction wheel 87, a lever 100 of the bell crank type may be employed, and connected with the lever is shown a by a spring 102 thus tending to push the friction wheel toward full speed position. 1n combination with the stopping connections, to be described, this spring arrangement forms a very valuable starting expedient, it serving to move the wheel progressively across the disk from zero to full speed in a very satis factory manner for certain purposes. The

spring does not cause the wheel to jump across the disk and the wheel can only creep gradually across the disk as the rotation ot' the latter permits. This brings the machine to full speed without shock and without attention. As shown` the stopping of the nailing machine is `automatically effected under proper control by connections from a. driven member; namely,l the shaft 94, which, when the connections are operative, serves to adjust the variable speed transmitter, in the advantageous manner already described, to zero position. The action is positive, efiifient, and quick, yet easy and without noise or shock.

'of the shaft 117 is swung and The connections from the driven member 94 to thetransmitter S0, ST, comprisi- :i mem ber 105 in which are combined a gear lf'll. engaging gear 10T on shaft. 91. and a ram or groove 108 adapted to engage a tolower a stud 109. The stud and cam are remlrrcd relatively engageable and disengageable as a convenient means of ronnertingiand lisconnecting the connections between slm lll and the variable-speedtransmitter. "he stud 109 1s at the upper end ot' the rod lol. while the cam member 105 is loose on :i

short shaft 110. As seen in Figs. t and 4'., the cam and stud are disengaged so that the member 105 rotates'idly and the correct-tion are inoperative. In order to render the connections operative atsuitable times 'fr :it will, the following may be employed: irc control lever 113 may be movablii` by il knee of the operator so as to swing about its pivot 1.14 and thereby through the li; 115 to rock the arm 110 and the shaft 1li. Thereby a yoked arm 118 at the upper cnf-l, throligi; its engagement with a grooved sleeve 111.* oar ing member 105 may shift the latter so l, the cam 108 will engage or disengaye i ic stud 109. The cam groove 108 at its in inner end is concentric for a portion. of' revolution to assist the stud 109. drop! thereinto and is thereafter eccentric it perhaps a concentric portion at the'end i'fr safety' or other purposes. The operatie substantially that when the control o. 113 is thrown it presses the constantly tating cam member 105 toward the stud i119 until the latter enters the cam groove vnl vere upon the stud thrown outwardly ordownv wardly by the cam thus forcing down the rod 101 and swinging the hell crank `100 to adjust the friction wheel 8T toward the eerter of the disk 86. The outer terminus el' the cam groove corresponds with tbe xero position of the friction wheel. (ion e quently this is an example olf a .lriven mene ber causing a progressive adjustment or a variable speed transmitter to zero position to effect its own stoppage.

The modification in Figs. 8 to 10 is similar to thev preceding excepting that both the starting and stopping are positively etlect instead of employing ay spring for .L-'tartingg' as in the preceding. y The grooved siecve 119 is here omitted and. instead a groovefl roliar 122 pinned to the sha ft 110 so that the knee lever causes the shaft to shift inaliy endwise. The member 105 is loose between collars 123 vfixed to the shaft. When the shaft shifts to the right (Fig. 8^; the cani groove 108 engages the stud .1,09 to cause the stoppage of the machine as When, however, the machine is to be starteiil the following diti'erent mechani: n fromes into play: The spring 102 previtmsly re ferred to is omitted. Fixed upon the. shaft before described.

110 is starting cam 130 having groove 131 which commences at the periphery with a concentric portion and terminates near the center 4with a. continuous circular groove. On thc same rod 101 that carries stud 109 is a second stud 132 located to coperate with cam groove 131. It will be nn dei-stood that the member 105 is loose on the shaft 11.0 and driven by the gear 107. The shaft 110 is independently continuously rotated by means of a pulley 133 splined to the shaft and connected by a belt 134 with a pulley lilo on the driver S5. The opera tion is merely that when shaft 110 is .shifted to the left (Fig. 8) to disengage stud 109 from its cam the continuously rotated cam 130 is brought into engagement with its stud 132 so that the stud and the rod 101 are lifted from the zero position to the full speed position in which the parts are shown. Movement of the knee lever 113 disconnects the cam 130 and brings cam 10h into operation to stop the lnachine as before. Cam 130 is continuously rotating and effects the starting of the machine from the driver. Cam 10a' is intermittently rotatingr and et t'ects the stopping ot the machine trom thc driven member.

ii'hile this application discloses several restartingl devices acting' after the stoppage oi' the machine for automatically ieidjnsting the transmitter to put the machine in motion again` no claim is made specifically to the same herein, but the same -is made the subject ol applicantsl copending application Serial No, 812.050 tiled January 12), 101-l. Also. while this application discloses the stoppage of a machine by adjustment of the ariable speed transmitter to zero under the control of the driving shaft, that is not specifically claimed herein, but is made the subject ol' applicants cri-pending applications, Serial No. *22,380 filed March 9, 1914, and 30,503 filed May (3, lill-l. AXtlso, while this application discloses a certain control lever arrangement, for example, the novel arrangement of lever 113, and also a novel means for coupling or uncoupling the opern ating shaft, for example, the coupler UT, these features are not specifically claimed herein, but are illustrated and claimed in my aforesaid tro-pending application, Serial No. elastic.

It will thus l seen that there have been described various illnstpgtions embodying the operation and principles of the present improvement and attaining the objects and onditions thereof, and other advantages will be apparent to those skilled in the art. Since many matters of arrangement, detail, combination and other features may be indefinitely varied, it is not intended to limit the. present invention to such features excepting so far as specified in the appended claims. A

What is claimed is:

1. A machine speed changing mechanism including in combination. a driver, a. driven memben a variable speed transmitter between said driver and riven member, and mains whereby a running part of said mechanism may etfect the adjustment of the transmitter to relatively increase the forward speed of the driven member.

Q. -t machiner speed changing mechanism including in combination, a driver, a driven member. a variable speed transmitter between :said driver and driven member, andL means whereby said driver may effect the adjustment of the tral'ismitter to relatively increase the forward speed of the driven member.

3. A machine speed changing mechanism including in combination. a driver, a driven member, a variable speed transmitter between said driver `and driven member, connections including a cam and follower between a runningr part ot' said mechanism and said transmitter whereby adjustment of the transmitter may be autoimitically ef fccted, said connections being normally in operative daring: the ruiming 'of the machine. and a controller for rendering said connections operative at suitaole times to chantre the relative speed ol the driven nieml: r.

4. A machine speed changing mechanism including in combination. a driver. a driven member, a variable speed transmitter between said drive' and driven member, connections includimgr a clutch between a running part of said mechanism and said transmitter whereby adjustment of the transmitter may be autonmtically effected, said connections being normally inoperative during the running ot the machine. and a controller for renderingr said connections operative by closing .said clutch at suitable times to change the relative speed ot' the driven member.

5. A machine speed changing mechanism including in combimition, a driver, a driven member, a variable Speed transmitter between said driver and driven member and means whereby said driven member may effect the adjustment ot' the transmitter to change the speed ratio` fl. A machine speed changing mechanism including in combination. a driver, a driven member, a variable speed transmitter between said driver and driven member, connections between said driven member and said transmitter whereby adjustment of the transmitter may be automatically effected, said connections being normally inoperative during the running ot' the machine, and a controller for rendering said connections operative at suitable times to change the relative speed of the driven member.

7. A machine speed changing mechanism including in eoinbinz'ition` a driver, a driven member, a variable speed transmitter be tween said driver and driven member and meansl \\'hereb v said driven member maretl'eet the adjustment of the. transmitter toward or to zero position. and means for adjustiner the transmitter toward driving position.

A mac-bine speedvchanging iiieehanism inrluding in rombination, a driver, a driven member. a variable speed transmitter between said driver and driven member, conneetions between said driven member and said transmitter whereby adjustment of the. transniitter toward zero position n`ia v be automativ--allv elfeeted` said ronneetions being normally inoperative during the run ninpr ol' the maehine, and a controller Vtor rendering said connections operative at suitable times to eliange'tlie relative speed ot the driven member. and means for adjusting.,Y the transmitter towarddrivingposition.

il.A marhine speed changing mechanism ineludinf."r in eon'ibiiiatiori, a driver, a driven member. a variable speed transn'iitter be tween said driver and driven member. conneetious between lsaid driven member and said transmitter wlierebv adjustment of the transmitter to '/,ero positioirniav be. autoinatieallv elleeled. said eoiineetioiis beinelr normallv inoperative dnrinfrr the runnin; ot the mai-bine. aml a .eintroller for renderinf;r said eonneeiions operative at snitabletimes whereby the driven member is :1a-used to brineA about its own stoppage.

lll. niar'liilie speed -ehangiirer mechanism .iin-ladiner in eombination. a driver. a driven member. a variable speed transmitter between said driver aml driven member. ronnertions4 between said driven member and said transmitter liereb`\' adjustment of the tr.-insmitter to zero position ina v be antoinatieallv ell'eeted. said eonneetions being normalliv inoperative duriir;r the running of the marhine` and a eontroller or rendering said eonneetions operative whereby at .snitabletinies the driving action is deereaseil and the drivenA memberis sinmltaneonslv retarded to briner about itsl own stoppage snbstaidiall) in the niaiiiier speeilied."

l1. maeliine speed rlianginer meebanisni including,r in combination, a driver, a driven member` a variable speed transmitter between said driver and driven memberz con nei-tions. including a cam having a. uniform throw, between said driven member and said transmitter whereby adjustment 0f the tin-msmitter to zero position inay be automatically effected with a decreasing rate of speed decrease. said. connect-ions beiiignor-v mall .v inoperative during the running of the maelnne. and a'eontroller' for rendering said eonneetions ope 'ative :it suitable times whereby the. driven member. is caused'to bring about its own stoppage. v

l2. A iiiaehinespeed changing mechanism iin-ladiner in combination, a driver, a driven member. a variable speed transmitter be: tween said driver and driven'niember, conneetions between said drivenmember and said transmitter wherebyfadjlis'tment of the transmitter to zero position may be automatieallv effected, said connections bein norinall \v inoperative during the rumiing'o the matbine1 a controller for rendering said eonlieetions whereby .the driven member is caused te brin;r about its own stoppage, and means for adjusting said transmitter from zero te.

whereby the drivenniember mayv be 'caused' to brin;r about its own stoppage, said confY trolleradapted to be thrown out tv o interrupt the adjustment and thereby permit drivin;r at redured speed. ln ies-limoni' whereof I afiix my signature in presenre olf'tgx'ihlfwitneSSeS. l

AUGUST R.

operative at suitable .times SCHOENKY.

seA 

